Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3087c0eda86bc32…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 01:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e41a9e23233574f287e499e2c8112280 SHA-1: 4e68b75d1a111c633050648749a8c9287015242a SHA-256: e3087c0eda86bc32f2595925f281af62cfc35d9757dd7a7c7561050d7ec6d0ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=alternative+dispute+resolution+act+1996+pdf PDF link annotation
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/flp8krqjk5oqi323um7uv9vjul/kuwurodesofoxikonowopot.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e68c28a1---fuwukavuporukob.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021829160495406.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/90408205199.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/d38u496bm18fv5l79pmt0vh57c/bupifetugatir.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/divazaz.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/27259294317.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/judijudizetewet.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/sejefelenetiri.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ac27c362e12dbfb512c37dd039edcbc6/98100397919.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba724f415e6---17005064646.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608526b3edc32---64420164940.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/meginogitububa.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/50480536502.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a181aaabf85---dutilizi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a7ed66aa15abdc1b2b8377478b0ced8/51360379384.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ca1c3dd4---35792096055.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/115909188360b3fd4dcc8de.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/sirijirik.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/97122244121.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a68cdee9ef8f6c53a05e258da7ea447d/93785965359.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/86317491182.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/44297904617.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 17164 bytes
SHA-256: 81a1555390bb920d9e0fa582d493daf5304d67e0eaf7e5340991c4f6f0aef8a3
font_01_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 11148 bytes
SHA-256: 43aade906179e89722bea724b3dc86fa07beddfd97058aca78b769ebbb14785e

Open this report in the interactive analyzer, or submit your own file for analysis.